Phylum Arthropoda Jointed appendages Exoskeleton Bilateral symmetry Open Circulatory System Well developed nervous system with a Brain Well developed muscles
Subphylum Uniramia Unbranched appendages
Subphylum Uniramia Unbranched appendages Jaws
Subphylum Uniramia Unbranched appendages Jaws One pair of antennae
Class Insecta Six walking legs Three body sections
Mosquito
Dragonfly
Wasp
Ants
Grasshopper
Praying Mantis
Monarch Butterfly
Butterfly Metamorphosis
Zebra Butterfly
Bee
Walking stick
Class Chilopoda Has many body segments Each segment has one pair of legs Centipedes
Centipede fangs
Class Diplopoda Each segment has two pairs of legs millipedes
Subphylum Chelicerata Specialized Mouth Parts: –Chelicerae Move up & down (stab) Often have fangs –Pedipalps (used to grab prey)
Chelicerae with Fangs Pedipalps
Subphylum Chelicerata Specialized Mouth Parts 2 body sections cephalothorax abdomen
Class Arachnida 8 Walking Legs
Spiders 8 Simple eyes Silk glands
Banana Spider
Crab Spider
Flame Tarantula
Tarantula Chelicerae
Scorpion
Chelicerae
Scorpion Chelicerae
Deer Tick
Tick under a microscope Chelicerae
Mite
Water mite
Class Merostomata Horseshoe Crab Only living member of this class
Horseshoe crab chelicerae
Horseshoe Crab Compound eyes Book gills
Many Taxonomists split the class Merostomata into two classes: Xiphosura – horseshoe crabs Eurypterida - eurypterids
Subphylum Crustacea 10 legs Two pair of antennae Mandibles (chewing mouthparts)
Blue Crab Mandibles
Subphylum Crustacea 10 legs Two pair of antennae Mandibles (chewing mouthparts) 2 or 3 body parts Predominantly aquatic
Spiny Lobster
Banded Coral Shrimp
Anemone Shrimp
Peterson’s Shrimp
Shrimp
Red Night Shrimp
Spider Crab
Arrow Crab
Star-eyed Hermit Crab
Decorator Crab
Gooseneck Barnacles
Pill Bug